Finding the Fourth Proportional to 13,238.73, 19,853.69 and 5,339.21

Step by Step Solution

1. Step 1: Write the proportion equation
   13,238.73 : 19,853.69 = 5,339.21 : x
2. Step 2: Convert to fraction form
   13,238.73/19,853.69 = 5,339.21/x
3. Step 3: Cross multiply
   13,238.73x = 19,853.69 × 5,339.21
4. Step 4: Simplify right side
   13,238.73x = 106,003,020.18
5. Step 5: Solve for x
   x = 106,003,020.18/13,238.73
6. Step 6: Final answer
   x = 8,007.04